Compressing-machine.



T. LUND.

COMPRESSI-NG MACHINE.

APPLICATION FILED IIAYI2. 1910.

1,172,471, PeIenIed Feb. 22,1916.

3 SHEETS-SHEET I T.V LuND. COMPRESSING MACHINE. APPLICATION FlL-ED MAY l2. 1910.

Patented Feb. 22, 1916.

3 SHEETS-SHEET 2 T. LUND.

coMPREssxNG MAoHlNE.

CATION FILED MAYIZ. 1910.

Patented Feb. 22, '1916.

3 SHEETS-SHEET 3.

/m/f/V ma Fig.

M6/446%@ guez-;- @yk UnrTnn sTaTns PATENT orrrcn.

THOMAS LUND, OF BEVERLY, MASSACHUSETTS, V i?lSSGrll'OR T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORORATIN O'E NEW JERSEY.

COMPRESSNG-MACHINE.

niveau.

Specification of Letters Patent.

Patented Feb. 22, 1916.`

To @ZZ whom t may concern.'

Be it known that l, THOMAS LUND, a citizen ot the United States, residing at Beverlv, in the county of Essex and State of llflassachusetts, have invented certain lmprovcments in Compressing-ldachines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts 1n the several figures.

This invention relates to machines for compressing leather blanks, such as heels or top liits. In one well known type oi machine used in this class of work a stationary die or follower is employed and a mold is arranged for reciprocation toward and from said die. rl`he mold is so constructed as to contract during its movement toward the die or follower to compress laterally a blank previously placed therein. The bottom of the mold 1s formed by a top lift plate, so called, and mechanism is provided for elerating the top lift plate relatively to theremainder of the mold, during the movement of the mold away from the stationary die, to eject a compressed heel or top lift from the mold. Feeding mechanism is also provided Jfor removing a compressed heel or top litt and supplying an uncompressed blank to the mold. ln machines' oi this kind it is important that the parts be so. operated as to allow su'icient time iorthe handling cic the blank with certainty and accuracy.

@ne important object of the present invention is to provide novel and improved mechanism for operating the top lift plate in proper timed relation to the operation of the other parts of the mold.

With this obj ect in view, a prominent feature of the invention consists in the provision, in a compressing machine having a contractile mold, of vrictionally operated means for ejecting a compressed blank from the mold. I have thus succeeded in producing a' machine in-which the most advantageous timing of the operation orl the parts may be secured, while the mechanism is more simple, cheaper to construct, and more certain and accurate in operation than is the case with the machines heretofore known in the art.

In the illustrated embodiment of the invention, the desired results are `,accomplished simply and effectively by maintaining a lever with a shiftable fulcrum in operative relation to the top lift plate andv connecting said lever with the movable mold carrying head oi the machine in such a manner as to cause actuation-oi the lever at the desired points in the movement of the head, the shifting movement of the 'fulcrum being against friction or resistance which permits lost movement to occur after, or before and after, the movement of the top lift plate. By this means the top lift plate may be actuated to eject a compressed heel or top lift as soon as the mold has expanded enough to release the compressed blank, allowing the longest possible time for removing the compressedV blank and supplying an uncompressed blank to the mold. Furthermore, l

am able to lower the'top lift plate promptly when the mold begins to approach the stationary die, to the end that the blank may be safely deposited at the bottom of the mold before the mold has contracted by any sub-` stantial amount.

It 1s desirable to provideV mechanism Jfor insuring a positive action oi the ejectorfin` case a' blank should stick in the mold and ach mechanism constitutes an important feature of the present'invention. v A

ln a preferred embodiment of the invention the 'fulcrumfof theV ejector actuating lever is carried by a irictionally held rod, and in this embodiment of the invention a positive action of the lever may be secured by providing a locking device arranged to engage said rod and so hold the iulcrum of the lever rigidly,the lever thereupon swing-V the reing under the positive actuation of ciprocating head of the machine.v Infthis sov connection the invention contemplates also the provision of mechanism for disengaging the locking device and permitting the normal frictional },*ielding of the fulcrum-carrying rod, and means for returning the rod to position after it has been displaced.

In the machine above referred to. the automatic mechanism for feeding a blank to the lnold and for carrying a compressed heel olf the toplift plate, comprises a. reciprocatory slide carrying a pair of pivoted blank-engaging arms and a tivo-path switch cam for operating said arms through suitable levers and cam plates.

It is a further object of the present invention to improve and simplify the feeding mechanism in. compressing machines and to provide' mechanism which shall operate uni formly upon the blank-engaging arms re gardless of their position and the direction. in which the machine is being' operated. rlhis feature is of particular importance in a compressing machine of the type in question since7 if the arms are not separated When the head is raised, they Will be caught between the mold and the stationary die and damaged.

In a preferred embodiment of my invenA tion a single stationary cam plate may be provided which is so shaped and located relative to the path of devices controlling the blank engaging arms that the-required operation is positively secured not only during the normal operation of the machine, but also in casethe machine should be turned baclnvardly from any point of its cycle.

A further important feature of my inven tic-n consists in the provision of means for supporting the toplift plate in such a manner that it can be adjusted vertically With relation to the cross head Without the necessity of removing the toplift plate and inserting filling pieces, as has been done heretofore.- These filling pieces have heretofore been supplied separately or loosely and suflicient of them inserted beneath the toplift plate to raise the same to the elevation required to form the mold of the proper depth to compress the heel or toplift of the particular thickness desired.- Such filling pieces as are not in use at any time in the machine are likely to become lost and it is found in use that they frequently become deformed and enlarged inarea sufficiently to interfere With the operation of the mold. embodiment of my invention, 1 dispense entirely with these filling pieces and support the toplift plate directly upon the upper horizontal surface of a Wedge shaped block, the lower inclined surface of which engages the upper surface of a correspondingly Wedge shaped block which is laterally adjustable with relation to the cross head., on which it rests, so that by adjustingthe lower In the present Wedge laterally the upper block may be moved up and doivn7 thusk securingthe desired vertical adjustment of the toplift' desirable to use smooth Wedges to etl'ect `the adjustment just referred to since it visditlicult to prevent slipping Athereof under such? great pressure.

A further feature of my invention accordingly consists in the formation of the engaging surfaces ofthe two Wedges in corresponding steps so that :at any desired adjustment thereof pressure may be applied to the toplift plate supported upon the upper Wedge block without any danger ofl the latter slipping or yielding.

@ther advantages and features of my invention will be best understood land appreciated from the following description of a preferred embodiment thereof selected `for purposes of illustration and shown 1n the accompanying drawings, in Whichl Figure lis a side elevation of the machine; Fig. 2 is a fragmentary front elevationof the machine; Fig. 3 is a sectional; view showing the topliftA plate and mecha nism for ejecting compressed blanks; Figais aview in perspective of the toplift plate mechanism: F 5 is a view in perspective of the feeding device; Fig. G is a perspective view of the face of the stationary cam plate which actuates the blank engaging arms; Fig. 7 is a view in perspective of va modified form of toplift plate supporting device mounted in the lreciprocatory cross head; Fig. 8 is a transversecentral section showing the devices illustrated in Fig. -7 with the heel mold in operative relation thereto; and Fig. 9 is a sectional detailupon an enlarged scale-showing the formation of the engaging surfaces ofthe Wedge blocks.

l indicates the rigid frame Work of the machine in Which the actuating mechanism is supported. Vertical guideuf'ays are formed in the sides of the rigid frame and the head 2 is mounted therein;` for reciprocation. A driving shaft 3 is mounted in bearings in` thel r ar portion4 of the frame and provided with suitable fast and floose4 pulleys. The driving shaft carries a pinion l Whichv engages with a gear 5 on a counter shaft 6. The counter shaft G carries a pin-ll ion 7 Lwhich meshes With a gearS on a crank shaft 9. A link 10 is connected to the ,crankl Y shaft 9 and `also to a toggle composed of` members 1l and 12. The toggle member y1l is pivoted at 18 to a` rigidv portion of the frame near its base.

of the machine and arranged to conduct The other toggle 12` is pivoted at `14 to the reciprocating head 2.y 15 indicates a chute attached to the framev away the compressed Ablanks as they are ejectedrfrom the compressing mechanism.

The reciprocating head carries a heel mold comprising a toplitt plate l0, a breastplate 21 and laterally movable side com* pressing dies 22, one of which is shown in Fig. 3.

ln the upper part of the machine Jframe and in line with the reciprocatory head 2 is formed a. rigid abutment 23 upon which is detachably mounted a heel seat die 25 in position to cooperate with the mold carried by the head 2. The side compressing dies 22 resting on the top of the head 2 are removably retained in slides 26 in order that other dies of different shapes may be substituted in changing from one style of heel to another.

rlhe side compressing dies and breast plate 21 are actuated to close the mold and thereafter are opened to release the compressed heel by any desired mechanism, for instance by normally inclined links 1? pivoted on opposite sides to the frame of the machine at 1S as shown in Fig. 2.

rlhe toplitt plate 40 is provided` with a downwardly extending stem Ll1 which is formed integral therewith, as shown, or may be otherwise rigidly connected thereto. The stem Ll1 is slotted at 50 to receive the inner end of a yieldingly mounted stop pin 51 which acts positively to limit the upward movement of the toplift plate exactly to the plane of the table for the feeding mechanism to be hereinafter described. lThe stop pin 51 prevents the plate 40 from being accidentally expelled from its soclret and also prevents rotary movement thereof, but it may be withdrawn from engagement with the stem l1 to permit the removal of the toplift plate when desired. ln its lowest position the toplift plate rests upon the top of the head 2 although when relatively low heels are to be compressed one or more shims or filling plates may be placed between the head and the under side of the toplift plate.

In order to move the toplitt plate to eject a compressed heel at the proper time there is provided lever 100 pivotally mounted on the pin 11st in the head 2 or the machine and having its inner end arranged in alinement with the stem 1-1 or the toplitt plate. Pivotally connected with the lever 100 by the pin 112 is a forked piece 101 tothe lower end of of which is rigidly connected a rod 102. The rod 102 entends through a friction box 103 formed in part of the stationary frame and having a fiber bushing 109 surrounding the rod 102 but cut away.

on one side to permit a friction plunger 10ft to engage the rod and press it against the bushing thus frictionallv opposing vertical movement ot' the rod in both directions. lt

'ill be seen that, in the downward movement of the head 2, the pivot pin 112 momentarily acts as a fulcrum for the lever 100 and causes it to swing upwardly about the point into Contact with the stem 41 which it elevates, thus moving the toplift plate 40 into position to eject a compressed heel and yreceive a heel to be compressed.

Normally the frictional resistance of the rod 102 will be su lcient to hold the ulcrum pin 112 of the lever 100 stationaryand thus swing the lever upwardly to elevate the toplift plate, but in order to secure a positive action orn the lever 100 at the proper point in the cycle of the machine, in case a heel should stick in the mold, a yoke-shaped piece 105 yprovided with an abutment 106 kis pivoted on a pin 107 to the trame oil the machine and normally maintained by a spring 108 in position to engage the lower end of the forked member 101 in case the lever 100 shouldr forced downwardly against the 'friction of the 102 without lifting the topliitt plate.' The abutment 106 will, in this event, hold the Jforlred member 101 stationary and insure an immediate positive movement or the lever on the downward njio'vement of the head 2 until the toplift plate has been moved to ejecting position. ln order to move the member 105 into an inoperative position and release the forked member 101 and allow fur lier downward movement of the rod 102 when the topliit plate has reached its ejecting position, a wedge cam 110 is mounted nponthe head 2 and arranged to engage with the beveled ends of yoke-shaped piece 105 and swing this member' out oit engagement with the Vpiece 101 thereby permitting further downward movement or the lever 100 which, after raising theV stem L11 to the limit is swung positively.7 downward during the remainder of they downward movement of the head. Normally the end of the lever 100 stands short distance below the end ci' the stem al1 vin, order that the head 2 may be permitted to movev downwardly lar enough to release the pressure of the lateral dies upon theheel in the mold before the action of the lever 100Aon` the toplit plate begins. Accurate timing or this operation, however, is not necessary in the present construction, since, it the stem L11 yengages the lerer before the compressed heel is released, the lever is merely forced downwardly against the 'friction vof the rod v102 untilk the dies are `retracted or until the abutment 10G is encountered.

TWhile the head 2 at or near it. loweri most position and while 'he side dies separated to the fullest extent and t ie plate 40 is in its upper position, the feeding mechanism, to be hereinafter, described, is actuated to remove a compressed heel from the plate and deposit a new blanlr in its place.

Thereupon the upward movement of the head begins. During the irst partof this movement the rod 102 will again be held stationary momentarily by friction and the lever 100 immediately swings downward about its fulcrum 112 thus allowing the toplift plate to drop under the influence of gravity. rlliis operation occurs promptly at the beginning of the upward movement of the head so that the uncompressed blank is lowered to the bottom of the mold before the side dies 22 have closed to any appreciable extent. After the lever 100 has been swung away from the stem 41 and the toplift plate has reached its lower position the lever and rod 102 will be drawn upwardly against the friction: of the bushing 109 and plunger 1011- by the engagement of the shoul der 108 on the forked piece 101 with the top edgeof the cam. 1.10 and so returned to.

normal position.

The reciprocating head 2 has a forward extension 20 which constitutes a table or support for a feeding and ejecting fmechal nism.

This mechanism comprises, among its parts, the slide 460 movable on suitable guides on the table and having pivotally mounted thereon the heel 'blank engaging arms 617 61. Grasping plates 62 are pivotally connected with the arms 61 by pins 63 and are adapted to be readily removed and replaced by other plates of different sizes according to the shape and site of the heel blanks to be fed. An abutment 64 is formed on the slide 60. and is adapted to engage the breast of a heel blank. Leaf springs 65 are secured to the arm 61 and arranged to act upon the plates 62 to turn them toward the abutment Gil. The spring-pressed plates 62 and the abutment constitute a clamp for embracing and holding a heel or toplift blank vhile it is being fed into position on the toplift plate L10 beneath the die 25.

lThe free ends of the arms 61 'are provided with enlargements or shoulders 66 to contact with and push a compressed heel off the toplift plate and to the chute 15 when the slide is movedv forward to feed anuncompressed heel blank into position on the top lift plate. The adjacent faces of the arms 61 have interlocking segmental gears formed thereon. One of the-arms has an extension 67 located between two lugs 68 and 69 on theslide 60. The lug 66 has a socket formed therein and receives a spring pressed pin 70 which acts to hold the eXtension 67 normally against the lugs 69 and the arms 61 closed toward each other Iin position to clamp and hold a heel blank. |The lug 69 is provided with a guideway in which there is mounted a beveled sliding block, 71 which is arranged to act upon the extension 67 against the action of the spring pin 70 to force the extension 67 of the arm 61 toward the left in Fig. 5 to separate the arms and release the heel blank.`

For actuating the sliding block 71 to separate the arms 61 and deposit a heel blank on. the toplift plate there is provided a cam.

plate 75 rigidly mounted on a bracket76 fast t0 the stationary frame of the machine. rlhe cam plate comprises a continuous sur.-` face having a substantially vertical portion 77 and an outwardly and downwardly `fiar-i ing bottomportion 7 8. rlhe plate is inclined downwardly and z rearwardly and is so located with respect to the path of the sliding block 71, as this block is moved upwardly and downwardly with. the head 2' and forwardly and rearwardly with the feeding slide 60, that the block 71 is forced'inwardly to separate the arms 61 when the clamp formed bythe plate 62 and the abutment 6e is squarely over the toplift plate 40 and the mold bei gins to approach the stationary die 25 on the upward movement of the head 2. is already intimated, the operation of depositing'the i uncompressed blank onthe toplift plate is timed tocorrespond with the beginning of therdownward movement of the latter, which; occurs with the beginning of the ascendingv movement of the head. The shape and arrangement of the cam plate are such that whenever the head 2 moves toward the die 25 and the carrier is in its inner position, the

arms 61 are separated so that there is no possibility of the arms becoming lcaught fbetween .the mold and .the die whether the machine is being turned over in the normal. direction or being reversed.

The slide 60 has a tail piece 90 pivotallv` connected to-it and provided on its rear pend with a latch bolt 92 to lock it normally in the arm ofy the bell crank lever 94 is connected by a roller y96 with the slotted rod 99 yieldingly mounted in a. sleeve 97 pivoted to a i lug formed on the stationary frame of the machine. Aspiring (not shown) within the sleeve 97 serves to holdfthe rod 99 normally in an extended position, as shown in Fig. 3.

The slot in the rod 99 forms a lost motion:

connection between the rod 99 and the lever 94. During the first part of the rise'of the reciprocating head 32. the roller 96 travels in the slot and the lever 94 is not actuated to move the feeding slide 60. During the latter part of the rise of the head 2-tlie roller comes to the end of the slot and thereafter the lever 9f-ilis` actuated to nieve the slide outwardly. lllhen the head 2 beOins to descend the roller 96 again travels the length of the slot without actuating the lever 911 or causing the slide G0 to be moved, giving ample time for the'workman t0 insert a heel blank into the clamp, but after the roller reaches the lower end of the slot the lever 9f-l is actuated to move the feeding slide GO inwardly to present the blank to the compressing dies and to eject the compressed heel. rEhe yielding connection between the rod 99 and the sleeve 97 permits yielding of these elements in case the movement of the feeding slide is obstructed or interrupted.

ln the form of toplift plate supporting device shown in Figs. 7, 8 and 9, 1 have entirely dispensed with the filling pieces heretofore used for the purpose of adjusting the vertical position of the said toplift plate with relation to the cross head 2 and have provided means for effecting this adjustment which l shall now'proceed t-o describe.

A recess 115 is formed in the upper portion of the cross head and a wedge shaped block 116 is mounted to slide forwardly and rearwardly in the said recess. Inserted in the under side of said block is an outwardly projecting lug 117 having a downwardly bent forked end. The said forked end engages in an annular grooife 11S formed immediately under the head of a screw 119 which is tapped into the cross head2. The screw 119 is provided with a squared head,

as shown, for the purpose of permitting easy.

adjustment thereof. Superimposed upon the block 116 is a second wedge shaped block 120, the under surface of which corresponds to and engages the upper surface of the block 116. y

The block 120, as shown, is shorter than the block 116 and fits between two bars 121 and 122 bridged across the upper portion `of the recess 115 so that while the block 116 iii-ay have forward and rearward movement in the recess, the block 120 can 'move only vertically therein. rLhe last-mentioned block is provided with a central hole 128 permittingthe passage of the stem e1 of the toplift plate i0. A slot 1241- in the lower block 116 permits the passage of said stem through the lower bloei: and allows said lower block to be adjusted horizontally. The stop pin 51 operates to limit the upward movement of the toplift plate in the same manner as previously described. It is essential in niachilies of this character that the depth of the mold, of which the toplift plate l() forms the bottom, may be quite accurately determined. rThis is diliicult if wedge blocks having smooth engaging surfaces are employed since the great pressure brought upon a line adjustment of the height of the top-k llift plate. The direction of the tread surfaces of the steps being perpendicular toV the line of application of pressure, it will be seen that after adjustment has once been effected, there will be no danger whatever of the paits slipping, no matter how great may be the pressure applied thereto.

An indicating mark 127 is made upon the head of the screw 119 and a corresponding indicatingA mark 128 is made upon the downwardly projecting portion of the lug 117. The pitch of the screw 119 is such that one rotation, -or some aliquot part of a rotation,

thereof, will move the block 116 longitudinally a distance equal to the length of one of the steps 125. The indicating marks 127, 128 areso placed that when they register with each other the steps upon the `two wedge blocks are in complete engagement as shown in Fig. 9. This is for the purpose of allowingthe operator by an inspection of the indicating marks to determine when the adjustment is such that a full bearingsurface between the two wedge blocks is obtained in order to support the pressure and to avoid anydanger vofshearingoif the edges of the steps., By reason of the inclination of the risers the stepped formation ofthe engaging surfaces of the wedge blocks does not interfere with the adjustnient thereof by means of the screw'. Finger recesses 129 are provided tofacilitate the removal of the upper block 120 when desired.l

' The driving shaft 3 is provided ywith fast and loosepulleys and with a .Hy wheell. 32 indicates a belt shifter carried on a longitudinally movable rod 35 upon which is also carried a brake 36 in positionv toen- 'the fly wheel and stop theinaehine kwhen the belt is shifted to the loose pulley. rlhe rod 35 is actuated by a rock-shaft 37 having one arm 38 engaged therewith and the other arm 39 provided with a handle Vwith a foot treadle by means of which it may be turnedto cause the machine to be started.

The operation of the machine is 4as follows: Wien the reciprocating head2 is in its lower position, the several parts of the mechanism occupy the positions shown in Fig. 1, `the heel blank having been fed to the toplitt plate and being still held in the grasp of the clamp. When the machine is set in operation bly-throwing the lever 39, the head. i2 begins to rise. Immediately the sliding block "(1 encounters the cam plate 75 and is pressed vinwardly against the eX- tension 67 separating the arms G1 and opening the clamp which deposits an uncompressed blank upon the toplift plate. The toplift plate which is held in its upper position when the head 2 is in its lower position is allowed to diop to the bottom of the mold carrying with it the blank deposited thereonby the clamp. In the continued rise of the head 2 the arms of the feeding and ejecting mechanism are `further separated by the continued action of the cam plate 75 to present a clear space betweenthe mold and the heel seat die 25 and said arms are held in this separated position during the rise of the head '2 and during the subsequent retraction of the feeding and ejectiing mechanism. I` he links 17 for actuating the slides 26 move `about their pivots 18 and during` the last part of the rise of the head 2 the side compressing dies and breast plate are contracted to close the mold and the heel which, is in the mold between the toplift .plate and th-e heel seat die is compressed both laterally and vertically. The feeding and eyecting mechanism is also moved-out- ,wardly into position to have a new heel blank put into the heel clamp.

On the downward motion of the head 2 the side compressing dies and breast plate are moved to expand the mold and release the compressed heel and thereupon the lever 100 operates to elevate the toplift plate and carry the compressed heel into position to be pushed out to the chute 15. The feeding and ejecting mechanism remains at rest in its outward position lduring part of the descent of the head. Q and during this period the arms 6l are held separated allowing time for the workman to place an uncompressed blank in the clamp. On the continued downward movement of the head Q the sliding block 71 moves outwardly on the flaring portion. of the cam plate 75 and the' clamp is thereupon closed upon the blank by the action of the spring-pressed pin 70. During the latter part of the descent of the head the feeding slide is moved inwardly. lVhen near the end of its movement the shoulders 66 of the arms G1 strike the heel last compressed which is eing supported'on the elevated toplift plate and push it out into the chute. The inward movement of the slide continues until the clamp is located exactly over the toplift plate in which position the blank is held until released.

Having fully described my invention,

what I claim as new and kdesire to secure by Letters Patent of the United. States is rate points respectively to each of said members, and frictional `means for' normally opposing the movement of one of said members.

2. In a machine of the class described, the 'combination with heel compressing dies and a top-lift plate, of mechanism .for moving said toplift plate relatively to said dies comprising a pivoted lever and frictional means for actuating` said lever.

3. In a machine of the class described, the combination with a reciprocating head, of a mold carried by said head, a top-lift plate movably mounted in said mold, .a lever pivoted to said head, and frictional means for turning said lever on its pivot to move said top-lift plate.

al. In a machineL of the class described, the combination. with heel lcompressing dies and a top-lift plate, of mechanismfor `moving said top-lift platelrelatively to said dies i comprising a lever having a movable ful.- crum and irictional means normally holding said fulcrum stationary.

5. In a machine of the class described,`

the combination with a die, of a cooperating mold movable toward and from said die, an

ejector in said mold and movable relatively thereto, and means comprising` a frictionally mounted rod and connections between the rod` and the eJector for causing the ejector to risey in the mold durin, ;;the`

descent thereof and to drop during the lirst part of the ascent of said mold.

6. In .a machine ofthe class described;`

the combination with a mold comprisingl side diesadapted .to separate and receive a blank, and then to close and compress said blank, of a movable eject-or in said mold normally at the bottom thereof, means for vactuating said dies, and means confiprising a frictionally mounted rod and connections between the rod and theejector for yraising and lowering said ejector while the dies are separated.

7. In a machine of the class described, the combination with compressing dies and a top-liftplate, of a stationary frame having a frictionl member mounted therein,y a reciprocatory head carrying said dies,` and mechanism for moving said top-lift plate comprising a lever pivoted at` separate points respectively to said frame and said friction member.

8. In a machine oit the class described, the combination with compressing dies and atop-lift plate, of a frame, amovable ulcrum-carrying member' mounted therein, a reciprocatory head, and mechanism for moving said top-lift plate comprising a lever pivoted at separate points respectively to said frame and said fulcrum-carrying member.

9. ln a machine of the class described, the combination with a reciprocatory head, of a mold carried by said head, a top-lift plate, and instrumentalities for causing said top-lift plate to be moved relatively to the mold comprising a frictionally mounted rod, a lever movable with the head, and operatively disposed with respect to said plate, and means for positively preventing movement of said rod beyond a predetermined point Without actuating the lever.

10. ln a machine of the class described, the combination with heel compressing dies, of a top-lift plate, and mechanism forV moving said top-lift plate relatively to said dies comprising a frictionally mounted rod and locking device for said rod.

11. ln a machine of the class described, the combination With heel compressing dies, of a top-lift plate, and mechanism for moving said top-lift plate relatively to said dies comprising a rod, frictional means normally opposing movement of said rod, and positive means for preventing movement ofsaid rod beyond a predetermined point.

12. In a machine of the class described, the combination ivvith heel compressing dies, of a movable top-lift plate, positive means for limiting the movement of said plate, and ifrictional means for moving said plate.

13. In a machine of the class described, the combination with compressing dies and a relatively movable top-litt plate, of mechanism including rictionally `connected elements for moving said plate, and a separate device for positively preventing relative movement of said elements.

14. In a machine of the class described, the combination With compressing dies and a relatively movable top-lift plate, of mechanism including rictionally connected elements for moving said plate, and a locking device for rigidly connecting said elements against relative movement in one direction.

15. En a machine of the class described, the combina tion with compressing dies and a relatively movable top-lift plate, of mechanism including trictionally connected elements for moving said plate, a locking device Jfor preventing relative movement of said elements, and means for `rendering said locking device inoperative.

16. in a machine of the class described, the combination with compressing dies and a relatively movable top-lift plate, of mechanism including yieldingly connected elements for moving said plate, a device for preventing relative yielding movement of said elements after a predetermined relative movement thereof, and means operating at a subsequent point in the cycle-of the machine for again permitting relative movement of said elements.

17. In a machine of the-class described, the combination ivith'compressing dies and a relatively movable top-lift plate, of mechanism for moving said plate including a lever, rictional means for normally actuating the lever, and positive means arranged to actuate said lever on the failure of said frictional means.

18. In a machine' of the class described, the combination With compressing dies and an ejector, of mechanism for moving said ejector comprising a lever having a shittable fulcrum, means 'for swinging said lever about its ulcrum to actuate the ejector, and provision for moving said lever bodily after the actuationfof the ejector.

19. ln a machine of the class described, the combination with a mold of an ejector, and mechanism for actuating said ejector including a pivoted lever, said lever being movable about a center other than its pivot to actuate the ejector, and being further movable bodily Without affecting the ejector.

20. in a machine of the class described, the combination with compressing dies and an ejector, of a movable head, an ejector'- operating lever pivoted therein, and means for moving said lever about a center other than its pivot to actuate the ejector, and constructed and arranged for allowing movement of the lever Without aii-'ecting the ejector.

21. ln a machine of the class described,

the combination With a contractile mold andl y positive means for contracting it, of means for ejecting a blank from said mold and rrictional means for. eiecting operation or said ej ecting means.

22. ln a machine of the class described, the combination with a mold, of means for ejecting a blank 'from said mold, frictional means for effecting operation 01"' said ejecting means, and means for posi-.tively operating said ejecting means upon failure oi said rictional means.

23. A machine ot' the class described, having, in combination, a driving shaft, a mold comprising blank compressing members movable toward and from each other; separate means, comprising movable grippers, for feeding a blank to said mold; and means regardless of the direction of rotation of' the driving shaft for positively insuring the opening of the grippers Whenever the blank compressing members approach each other.

24. A machine or the class described having, in combination, a driving shart, a stationary die; a movable mold, separate means, comprising movable grippers, for feeding a blank to said mold g 'and means regardless of the direction of rotation of the driving shaft for positively insuring the opening of the grippers Whenever the blanlr compressing members approach each other.

25. il machine for operating upon parts of boots or slices, comprising the combination, with a compressing mold `comprising stationary and movable dies, of feeding mechanism, including pivoted blank engaging arms, movable with the movable die t0- vvard and from the stationary die, and a plate mounted in lfined relation to the stationary die and having a downwardly inclined cam face constructed and arranged to separate the said pivoted arms, in any position which they may assume, Whenever they approach the stationary die and hold them separated until they recede from the stationary die.

2G. ln a machine of the class described, the combination vWith a compressing mold and a top-lift plate, of mechanism for moving `said top-lift plate relatively to said mold including a lever and an acuating device therefor frictionally mounted on a stationary part 'of the machine.

27. A heel compressor having a compressing` mold provided with a bottom which is adjustable to vary the depth of the mold, and means for effecting the adjustment, comprising cooperating Wedges the engaging surfaces of which are correspondingly stepped.

A heel compressor, having',` in combination, a stationary follower, a supporting member mounted for reciprocation t0- vai'd and from said follower, a mold mounted upon said supporting member, said mold being provided with a bottom which is movable therein, a vertically movable Wedge block upon which the bottom of said mold is supported and a horizontally movable Wedge bloclr engaging said vertically movable Wedge block vf'liereby the depth of said mold ma)7 be adjusted.

29. l'n a machine of the class described, the combination of a mold having a movable bottom plate, a depending post. attached to said bottom plate, a vertically movable Wedge bloclr upon which said bottom plate is supported, said Wedge block having an aperture through Which said post extents and a second Wedge block movable with relation to said rstmentioned Wedge bloclr and havinga slot through Which said post passes.

30. A. machine for compressing bootor shoe parts having, in combination, a compressing member and means for adjustably supporting said compressing member, said means comprising coperating Wedges, the engaging surfaces of which are stepped.

3l. A machine for compressing boot or shoe parts comprising the, combination With astationary compressing member, of a movable compressing member, a. :movable support upon which said last named member is mounted, and means, comprising` Wedges having stepped engaging surfaces, for= adjusting said movable compressing member ivith relation to its support.

82. .A machine for compressing boot orshoe parts, having a compressingv member and means for adjustably supportingsaid compressing member, said ,means compris-- ing cooperating Wedges, the engagingy surfaces of Which are stepped, the riser portions of the steps being inclined With relation to the tread surfaces thereof.

33. A machine for compressing boot-or4 lWard and from each other, mechanism,icom prising stepped Wedges, one of Which isy movable with relation to the other, for adjusting one of said compressing members, and means for indicating When the steps of one of said Wedges are in full engagement. With those of the other.

35. A machine for compressing boot or.4

shoe parts having, in combination, coinpressing members relatively movable to-v ward and from each other, a vertically movable vvedge block upon which one of theI compressing members is sustained, ay horizontally movable Wedge block coperating Withl said vertically movable Wedge blocln,

the engaging surfaces of said blocks being4 formed in steps, means for adJusting said horizontally movable Wedge block and means for indicating When the steps of one bloclr are in full engagement With those of the other.

36. A machine of the class described, hav` ing,l in combination, compressing members,

relatively movable toward and. from eachy other, a vertically movable Wedge block upon which one of the compressing members is sustained, a horizontally movable Wedge block cooperating With said verticallyjmovable Wedge block, the engaging surfaces of said blocks being formed in steps, a` screw for adjusting said horizontally movable Wedge block, the pitch of said screw having` such relation to the length of each of said steps that one revolution of the screvvr Will advance its wedge the distance of a step,

and means for indicating the revolutions of the screw.

37. A machine for compressing boot or shoe parts comprising an adjusting device having, in combination, a stepped wedge adjusting member, a cooperating member having a stepped surface for engagement with said wedge member, and means whereby said wedge member may be moved in a direction to increase the effective thickness of the adjusting device.

3S. A machine for compressing boot or shoe parts comprising an adjusting device having a stepped wedge member, a stepped member engaging said wedge member, and means for relatively adjusting said members in the direction of succession of the steps.

39. A machine for compressing boot or shoe parts comprising the combination of a stepped adjusting wedge member, a coperating member having a stepped surface for engagement with said wedge member, and means whereby said wedge member may be moved in a direction from the thick edge toward the thin edge thereof.

40. In a machine of the class described, the combination with a movable mold, of means for ejecting a blank from the mold and frictional means, brought into action by movement of the mold, for elfecting operation of the ejecting means.

41. A machine for operating on parts of boots or shoes comprising the combination with a compressing mold and movable feeding mechanism, including relatively movable blank engaging arms, of stationary means for separating the arms andvkeeping them separated in any position which they may assume, during each compressing operation of the machine.

42. In a machine of the lclass described,

tively movable members in frictional en-` gagement with each other, and means for returning said members to initial relationafter relative movement thereof.

4.4. In a machine of the class described, the combination of a compressing mold, means for ejecting a blank from the mold, frictional means, comprising relatively movable elements, for operating said ejecting means, and means for restoring said elements to initial relation after relative movement thereof.

.45. In a machine of the class described, the combination of a compressing mold, a movable member for ejecting a blank from the mold, frictionally operated mechanism, comprising relatively movable parts, for operating the ejecting member, and positive means for restoring said frictionally operated mechanism after relative movement of its parts. i f

In testimony whereof I have signed my name to this specication in the presence of two subscribing witnesses.

THOMAS LUND.

Witnesses:

HERBERT W. KENWAY, JOSEPH B. GiLBERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

It is hereby certified that in Letters Patent No. 1,172,471, granted February 22,

1916, upon the application of Thomas Lund, of Beverly, Massachusetts, for an improvement in Compressing-Machnes," errors appear in the printed specification requiring correction as follows: Page 7, lines 120-122, claim 23, and page 8, lines 1-2, claim 24, strike out the Words regardless of the direction of rotation of the driving shaft; page 7, line 124, and page 8, line 5, before the periods, claims 23 and 24, insert the Words regardless of the dt'reet'ton of rotation of the driving shaft;

and that the said Letters Patent should be read With these corrections therein that the same may conform to the record of the case in the Patent Office.

signed and Sealed this 2d day of May, AjD., 1916.

[SEAL] R. F. WHITEHEAD,

Acting Commissioner of Patents. Cl. 12-48. 

